WowAce

In-game EPGP guild helper, supports standby, main/alt shared pools, minEP, offpecGP. Fixed price list with progress multiplier.

Eliminates the spam from the chatframe and sums it up in a broker plugin.

BossList

Calendar improvements

Tracks Black Market Auction House auctions.

Saves contents of your guild bank and sends/receives updates over the addon channel

EnhancedLFG

Manager for DKP points. Requires DKP - Bidder as main Graphic User Interface.

On login, displays changes to your guild since the last time you logged in.

Displays a grid of guild ranks versus permissions.

Allows for easy congratulating when someone earns an achievement.

Meeuuuh

ORLIC

Facilitate better communication for loot councils

Send Mail to Groups

Shows guild and system message of the day only if either one of them has changed since the last login.

Allows raid leaders to view information on raid or guild member equipment information

Simple DataBroker plugin to display current GuildLevel, current GuildXP, max GuildXP & percentage actually earned of daily ca...

Save and send chat messages to many channels. Allows quick item and profession linking within your messages.

Reserve raider tracking for EPGP.